MultiModem MTCBA-C User's Guide Page 25

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Chapter 1 Product Overview
MultiModem rCell User Guide 25
RS232 9-Pin Functions of the Female End Connector
The following table explains the pin functions.
External Power
Serial Cable
Female Connector
Signal
IN/OUT
Pin 1 CD
O
Pin 2 RX
O
Pin 3 TX
I
Pin 4 DTR
I
Pin 5 GND
--
Pin 6 DSR*
O
Pin 7 RTS
I
Pin 8 CTS
O
Pin 9 RI
O
Note: The DSR signal on pin 6 is always asserted by the router.
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